#include <pthread.h>
#include <iostream>
#include <string>
#include <unistd.h>

//这是线程的局部存储
__thread int count = 1;
//全局变量，但又不想让其他线程看到
//但只能存储内置类型和部分指针

std::string Addr(int &c)
{
    char addr[64];
    snprintf(addr, sizeof(addr),"%p",&c);
    return addr;
}

void* routine1(void* args)
{
    (void)args;
    while (true)
    {
        std::cout << "thread - 1, count = "<<count <<"[我来修改count],"
           <<"&count: "<<  Addr(count) << std::endl;
        count++;
        sleep(1);
    }
}

void* routine2(void* args)
{
    (void)args;
    while (true)
    {
        std::cout << "thread - 2, count = "<<count <<std::endl;
        sleep(1);
    }
}

int main()
{
    pthread_t tid1, tid2; 
    pthread_create(&tid1, nullptr, routine1, nullptr);
    pthread_create(&tid2, nullptr, routine2, nullptr);

    pthread_join(tid1, nullptr);
    pthread_join(tid2, nullptr);

    return 0;
}